Apartment. PC and broadband connection on one end of room (or in another room), PS2 et al near entertainment center, with doors/open space in between any path. You can either run cable along the wall and door edge (ugly, no matter if you match the cable color to the paint or not) or try for wireless.
Powerline is more expensive, esp. if you\'ve already gotten a WAP for laptop use. powerline = two bridge minimum, if you\'ve got a WAP, wireless = one extra bridge.